<virology> A species of HTLV-blv viruses that can transform normal T-lymphocytes and can replicate in both t- and B-cell lines. The virus is related to but distinct from HTLV-I. It is associated with T-cell hairy cell leukaemia, a relatively benign disease. ... (12 Dec 1998) ... 
(= human T-cell leukaemia/lymphoma virus type II) Originally isolated from a T-cell line from a patient with hairy cell leukaemia. It has only partial homology with HTLV-I, and its pathological potential is uncertain.
Type: Abbreviation Definitions: 1. Abbreviation for human T-cell lymphotrophic virus type II; human lymphotropic virus, type 2.
HTLV-II: The human T-lymphotropic virus type II, which is closely related to HTLV-I.